Month: August 2019
1. Troubleshoot client connectivity issues involving DNS The IOS command ip name-server configures the DNS server IP address for a Cisco network device. All DNS queries are sent to the DNS server resolve the IP address from a hostname. That enables Telnet hopping that is based on a …
1. Configure and verify PPP and MLPPP WAN connectivity The following describe the standard reasons for deploying WAN connectivity: enable connectivity between branch offices, data center and cloud information sharing among internal and external organizations Serial Interfaces Serial interfaces connect devices that are assigned as a DCE or …
1. Describe routing concepts Routers are primarily responsible for logical addressing and best path selection. They forward packets between different subnets, VLANs and across the WAN. They build a routing table with routes comprised of network prefix, metric and next hop address. The router selects the route based …
1. Describe and verify switching concepts The following is a list of network services provided by switches: switches forward data link layer traffic switches create and maintain the MAC address table switches support segmenting collision domains MAC address table Every network device is assigned a unique hardware address …
1. Compare and contrast OSI and TCP/IP models The following describe the network services at each layer of the OSI model. Each lower OSI layer provided services to the next higher layer. Effective troubleshooting should start from the physical layer and verify connectivity to the application layer. Table …
1. A network technician receives a call from a use who is experiencing network connectivity issues. The network technician questions the user and learns the user brought in a personal wired router to use multiple computers and connect to the network. Which of the following has the user …
